I frequently recommend using Amazon's Product Affiliate API (check it out here https://affiliate-program.amazon.com), however there are a few other options available as well.
If you want to guarantee the accuracy of the data, you can go with the a paid solution. GS1 is the organization that issues UPC codes, so their information should always be accurate (https://www.gs1us.org/tools/gs1-company-database-gepir).
There are also a number of third party databases with relevant information such as https://www.upccodesearch.com/ or https://www.upcdatabase.com/ .
